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Articles 31 - 46 of 46
Full-Text Articles in Life Sciences
The Future Of Alfalfa: Understanding Gmo Traits And Their Impact On Production And Marketing, Phil Bollman
The Future Of Alfalfa: Understanding Gmo Traits And Their Impact On Production And Marketing, Phil Bollman
Kentucky Alfalfa and Stored Forage Conference
No abstract provided.
Emerging Export Markets For High Quality Alfalfa Hay, Tom Keene
Emerging Export Markets For High Quality Alfalfa Hay, Tom Keene
Kentucky Alfalfa and Stored Forage Conference
The exporting of hay from country to country has been evolving for many years. When we look at today’s exports of American hay, we see that the majority of it takes place off the west coast.
Managing Frost Damaged Alfalfa Stands, Christopher D. Teutsch, Jimmy C. Henning, S. Ray Smith, Tom Keene, Matthew Dixon
Managing Frost Damaged Alfalfa Stands, Christopher D. Teutsch, Jimmy C. Henning, S. Ray Smith, Tom Keene, Matthew Dixon
Kentucky Alfalfa and Stored Forage Conference
Wide fluctuations in springtime temperature are common in Kentucky. Late freezing temperatures in the spring can cause damage to alfalfa depending on how far along it is in breaking dormancy. This publication provides information on the effect of low spring temperatures on both established and new alfalfa stands that have begun growth, as well as a method of predicting sensitivity to late frosts or freezes.
Harvesting Alfalfa For Quality, Garry D. Lacefield
Harvesting Alfalfa For Quality, Garry D. Lacefield
Kentucky Alfalfa and Stored Forage Conference
Alfalfa can be harvested for hay, baleage, silage, greenchop or grazing. Our goal is to produce, harvest and market high yielding-high quality forage. Profitable alfalfa programs consist of four basic phases and each phase have a specific goal.
Integrated Management Of Alfalfa Diseases, Kiersten A. Wise
Integrated Management Of Alfalfa Diseases, Kiersten A. Wise
Kentucky Alfalfa and Stored Forage Conference
Alfalfa diseases can reduce forage quality and the longevity of alfalfa stands. Integrated management of diseases can minimize disease impact and improve forage stand and quality. There are several important pathogens that cause disease on alfalfa, and the occurrence of these diseases, as well as the severity of damage, depend on several factors, including the type of pathogen, the environment, and the level of resistance of the host to a particular disease. In addition, disease presence and severity are also influenced by agronomic practices, particularly sowing dates, cutting dates and frequency, and fertility programs.
An Integrated Pest Management Ipm Approach In Alfalfa Production Systems, Lee H. Townsend
An Integrated Pest Management Ipm Approach In Alfalfa Production Systems, Lee H. Townsend
Kentucky Alfalfa and Stored Forage Conference
Alfalfa lends itself to an integrated pest management (IPM) approach for alfalfa weevils and potato leafhoppers, the two key insect pests of the crop. Both species live in most alfalfa fields every summer. However, alfalfa can tolerate low levels of their feeding without costly yield or quality loss.
An Integrated Approach To Weed Control In Alfalfa Production Systems, Jonathan D. Green
An Integrated Approach To Weed Control In Alfalfa Production Systems, Jonathan D. Green
Kentucky Alfalfa and Stored Forage Conference
The importance of weed control in forage production should not be overlooked, especially when you consider the high investment associated with alfalfa and other legume forages. Weeds reduce forage yield by competing for water, sunlight, and nutrients. For example, yield obtained from the first cutting of alfalfa can be significantly reduced by a heavy infestation of common chickweed. In addition to yield losses, weeds can also lower forage quality, increase the incidence of disease and insect problems, cause premature stand loss, and create harvesting problems. Some weeds are unpalatable to livestock or, in some cases, may be poisonous.
Fertilizing High Producing Alfalfa Stands, Edwin L. Ritchey
Fertilizing High Producing Alfalfa Stands, Edwin L. Ritchey
Kentucky Alfalfa and Stored Forage Conference
There are no secrets for successfully producing a high quality alfalfa crop. Successful alfalfa production is a product of suitable site selection, proper fertility and pH management, good pest control, and favorable weather conditions throughout the season. This paper focuses on proper fertility and pH management practices.
Alfalfa Establishment: Getting Off To A Good Start!, Christopher D. Teutsch
Alfalfa Establishment: Getting Off To A Good Start!, Christopher D. Teutsch
Kentucky Alfalfa and Stored Forage Conference
Alfalfa is a highly productive forage legume that is well adapted to transition zone states like Kentucky. It can be grazed, hayed, or ensiled. Once established and under good management, expected yields range from 5-7 tons per acre per year. High yields can only be obtained from a dense and vigorous alfalfa stand. The first step in obtaining such stands is establishment. The establishment phase of alfalfa production is critical since realization of returns from all other input costs is dependent upon having a good stand and it is expensive. It is important to remember that alfalfa establishment begins long …
Fine Tuning Varietal Selection For The Mid-South, S. Ray Smith
Fine Tuning Varietal Selection For The Mid-South, S. Ray Smith
Kentucky Alfalfa and Stored Forage Conference
There are many new alfalfa varieties that have come on the market each year. In fact, it can be hard keeping up with all the developments. In the following pages I will overview most of the important traits that can be found in new varieties. These include Low Lignin, Roundup Ready®, potato leafhopper resistance, higher quality, resistance to new diseases, and more… Many times I am asked “Are new varieties really worth the cost?” The best way to answer that question is to consider work by Dr. Jimmy Henning where he summarized 24 location years of Kentucky alfalfa yield data …
Foreword Of Kentucky Alfalfa And Stored Forages Conference [2018], Christopher D. Teutsch, Christi L. Forsythe
Foreword Of Kentucky Alfalfa And Stored Forages Conference [2018], Christopher D. Teutsch, Christi L. Forsythe
Kentucky Alfalfa and Stored Forage Conference
No abstract provided.
Individual And Combined Effects Of Herbicide Tribenuron-Methyl And Fungicide Tebuconazole On Soil Earthworm Eisenia Fetida, Jiqiang Chen, Muhammad Saleem, Caixia Wang, Wenxing Liang, Qingming Zhang
Individual And Combined Effects Of Herbicide Tribenuron-Methyl And Fungicide Tebuconazole On Soil Earthworm Eisenia Fetida, Jiqiang Chen, Muhammad Saleem, Caixia Wang, Wenxing Liang, Qingming Zhang
Plant and Soil Sciences Faculty Publications
Earthworms are soil engineers that alter the soil bio-physical properties to favor plant growth whereas pesticides represent a significant threat to their abundance and soil health. Thus, we investigated the toxic effects of tribenuron-methyl (TBM) and tebuconazole (TEB) on the soil earthworm, Eisenia fetida. The TBM demonstrated low toxicity to E. fetida in the contact filter paper and artificial soil tests, with median lethal concentrations (LC50) of 135.6 μg cm−2 at 48 h and 511 mg kg−1 on day 14, respectively. Similarly, TEB also showed low toxicity to E. fetida in the artificial …
Cover Crops And Fertilization Alter Nitrogen Loss In Organic And Conventional Conservation Agriculture Systems, Rebecca E. Shelton, Krista L. Jacobsen, Rebecca L. Mcculley
Cover Crops And Fertilization Alter Nitrogen Loss In Organic And Conventional Conservation Agriculture Systems, Rebecca E. Shelton, Krista L. Jacobsen, Rebecca L. Mcculley
Horticulture Faculty Publications
Agroecosystem nitrogen (N) loss produces greenhouse gases, induces eutrophication, and is costly for farmers; therefore, conservation agricultural management practices aimed at reducing N loss are increasingly adopted. However, the ecosystem consequences of these practices have not been well-studied. We quantified N loss via leaching, NH3 volatilization, N2O emissions, and N retention in plant and soil pools of corn conservation agroecosystems in Kentucky, USA. Three systems were evaluated: (1) an unfertilized, organic system with cover crops hairy vetch (Vicia villosa), winter wheat (Triticum aestivum), or a mix of the two (bi-culture); (2) an organic …
Local Loss And Spatial Homogenization Of Plant Diversity Reduce Ecosystem Multifunctionality, Yann Hautier, Forest Isbell, Elizabeth T. Borer, Eric W. Seabloom, W. Stanley Harpole, Eric M. Lind, Andrew S. Macdougall, Carly J. Stevens, Peter B. Adler, Juan Alberti, Jonathan D. Bakker, Lars A. Brudvig, Yvonne M. Buckley, Marc Cadotte, Maria C. Caldeira, Enrique J. Chaneton, Chengjin Chu, Pedro Daleo, Christopher R. Dickman, John M. Dwyer, Anu Eskelinen, Philip A Fay, Jennifer Firn, Nicole Hagenah, Helmut Hillebrand, Oscar Iribarne, Kevin P. Kirkman, Johannes M. H. Knops, Kimberly J. La Pierre, Rebecca L. Mcculley
Local Loss And Spatial Homogenization Of Plant Diversity Reduce Ecosystem Multifunctionality, Yann Hautier, Forest Isbell, Elizabeth T. Borer, Eric W. Seabloom, W. Stanley Harpole, Eric M. Lind, Andrew S. Macdougall, Carly J. Stevens, Peter B. Adler, Juan Alberti, Jonathan D. Bakker, Lars A. Brudvig, Yvonne M. Buckley, Marc Cadotte, Maria C. Caldeira, Enrique J. Chaneton, Chengjin Chu, Pedro Daleo, Christopher R. Dickman, John M. Dwyer, Anu Eskelinen, Philip A Fay, Jennifer Firn, Nicole Hagenah, Helmut Hillebrand, Oscar Iribarne, Kevin P. Kirkman, Johannes M. H. Knops, Kimberly J. La Pierre, Rebecca L. Mcculley
Plant and Soil Sciences Faculty Publications
Biodiversity is declining in many local communities while also becoming increasingly homogenized across space. Experiments show that local plant species loss reduces ecosystem functioning and services, but the role of spatial homogenization of community composition and the potential interaction between diversity at different scales in maintaining ecosystem functioning remains unclear, especially when many functions are considered (ecosystem multifunctionality). We present an analysis of eight ecosystem functions measured in 65 grasslands worldwide. We find that more diverse grasslands—those with both species-rich local communities (α-diversity) and large compositional differences among localities (β-diversity)—had higher levels of multifunctionality. Moreover, α- and β-diversity synergistically affected …
Exploring Spatial And Temporal Variability Of Soil And Crop Processes For Irrigation Management, Javier Reyes
Exploring Spatial And Temporal Variability Of Soil And Crop Processes For Irrigation Management, Javier Reyes
Theses and Dissertations--Plant and Soil Sciences
Irrigation needs to be applied to soils in relatively humid regions such as western Kentucky to supply water for crop uptake to optimize and stabilize yields. Characterization of soil and crop variability at the field scale is needed to apply site specific management and to optimize water application. The objective of this work is to propose a characterization and modeling of soil and crop processes to improve irrigation management. Through an analysis of spatial and temporal behavior of soil and crop variables the variability in the field was identified. Integrative analysis of soil, crop, proximal and remote sensing data was …
Can Increasing Grass-Fungal Endophyte Symbiotic Diversity Enhance Grassland Ecosystem Functioning?, Mahtaab Bagherzadeh
Can Increasing Grass-Fungal Endophyte Symbiotic Diversity Enhance Grassland Ecosystem Functioning?, Mahtaab Bagherzadeh
Theses and Dissertations--Plant and Soil Sciences
The relationship between biodiversity and ecosystem functioning is important in maintaining agroecosystem sustainability. Plant-microbe symbioses, such as exists between the grass tall fescue (Schedonorus arundinaceum) and the asexual fungal endophyte Epichloë coenophiala, can be utilized to enhance agroecosystem functions, such as herbivore resistance. “Novel” E. coenophiala strains that vary in the production of mammal- and insect-toxic compounds have been identified, inserted into tall fescue cultivars, and are planted in pastures globally. Novel fungal endophyte-tall fescue associations may have divergent ecosystem function effects. This study assessed effects of different fescue-endophyte symbiotic combinations on pasture ecosystem function, including aboveground …